Electromagnetic Field Theory
Which of the following statement is correct for divergence of electric and magnetic flux densities?

 These are zero for static densities but non zero for time varying densities.
 It is zero for the magnetic flux density.
 Both are zero.
 It is zero for the electric flux density.

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Electromagnetic Field Theory
Magnetostriction is a phenomenon of

 change in permeability of ferromagnetic materials during magnetism.
 generation of magnetism in electrical conductors.
 change in physical dimensions of ferromagnetic materials during magnetism.
 generation of electricity in ferromagnetic materials.

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